Yesterday, opponents and proponents of the law made their arguments before the court. A decision has yet to be rendered, according to Feedstuffs.

The rule, which went into effect in November, is a revision of a previous rule that was changed to comply with a World Trade Organization (WTO) ruling. The U.S. Department of Agriculture has said the version of COOL now in effect meets the requirements of the WTO ruling, which was the result of a complaint filed by Canada and Mexico. Both countries have maintained that COOL unfairly favors U.S. products. In October, Canada and Mexico requested the WTO review the current law.